95 entries under hard topic. ×

23
indifferent(adjective, calm, dull, quiet, mean)
22
insensitive(adjective, dull, quiet, mean, bad)
21
cool(adjective, calm, dull, mean)
20
apathetic(adjective, calm, person, dull, quiet)
17
cold(adjective, calm, dull, mean)
17
aloof(adjective, calm, mean, cool)
17
unemotional(adjective, calm, dull, mean)
17
unfeeling(adjective, calm, dull, mean, bad)
16
callous(adjective, calm, person, quiet, mean)
16
frigid(adjective, calm, dull, mean)
16
insensible(adjective, quiet, bad, careless)
15
unmoved(adjective, calm, mean, cool)
15
unsympathetic(adjective, quiet, mean, bad)
15
impassive(adjective, calm, dull, careless)
12
unconcerned(adjective, calm, mean, cool)
10
stony(adjective, person, mean, cool)
9
cold-blooded(adjective, person, mean, bad)
8
icy(adjective, mean, cool, unpleasant)
7
heartless(adjective, mean, cool, unpleasant)
7
lukewarm(adjective, calm, mean, cool)
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APASmart Define. (2016). unresponsive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unresponsive/thesaurus/synonyms
ChicagoSmart Define. 2016. "unresponsive thesaurus" https://smartdefine.org/unresponsive/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, unresponsive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unresponsive/thesaurus/synonyms>.
MLASmart Define. "unresponsive thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/unresponsive/thesaurus/synonyms>